<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>

      <tree-table
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color:lightgreen"></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>

        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level===0" size="mini">一级</el-tag>
          <el-tag v-else-if="scope.row.cat_level===1" type="success" size="mini">二级</el-tag>
          <el-tag v-else type="warning" size="mini">三级</el-tag>
        </template>

        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>

      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>

    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" @close="addCateDialogClosed">
      <el-form
        ref="addCateFormRef"
        :model="addCateForm"
        :rules="addCateFormRules"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
			clearable
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
	data() {
		return {
			catelist: [],
			queryInfo: {
				type: 3,
				pagenum: 1,
				pagesize: 5
			},
			total: 0,
			columns: [
				{
					label: "分类名称",
					prop: "cat_name"
				},
				{
					label: "是否有效",
					type: "template",
					template: "isok"
				},
				{
					label: "排序",
					type: "template",
					template: "order"
				},
				{
					label: "操作",
					type: "template",
					template: "opt"
				}
			],
			addCateDialogVisible: false,
			addCateForm: {
				cat_name: "",
				cat_pid: 0, //父级分类id
				cat_level: 0
			},
			addCateFormRules: {
				cat_name: [
					{
						required: true,
						message: "请输入分类名称",
						trigger: "blur"
					}
				]
			},
			parentCateList: [],
			cascaderProps: {
				expandTrigger: "hover",
				checkStrictly:true,
				value: "cat_id",
				label: "cat_name"
			},
			selectedKeys:[]
		};
	},
	created() {
		this.getCateList();
	},
	methods: {
		async getCateList() {
			const { data: res } = await this.$http.get("categories", {
				params: this.queryInfo
			});
			if (res.meta.status !== 200) {
				return this.$message.error("获取商品分类数据失败");
			}
			this.catelist = res.data.result;
			this.total = res.data.total;
			//   console.log(this.catelist);
		},
		handleSizeChange(newSize) {
			this.queryInfo.pagesize = newSize;
			this.getCateList();
		},
		handleCurrentChange(newPage) {
			this.queryInfo.pagenum = newPage;
			this.getCateList();
		},
		showAddCateDialog() {
			this.getParentList();
			this.addCateDialogVisible = true;
		},
		async getParentList() {
			const { data: res } = await this.$http.get("categories", {
				params: { type: 2 }
			});
			if (res.meta.status !== 200) {
				return this.$message.error("获取父级分类数据失败");
			}
			//   this.catelist = res.data.result;
			//   this.total = res.data.total;
			this.parentCateList = res.data;
			// console.log(res.data);
		},
		parentCateChanged(){
			// console.log(this.selectedKeys);
			if(this.selectedKeys.length>0){
				this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1];
				this.addCateForm.cat_level=this.selectedKeys.length;
				return ;
			}else{
				this.addCateForm.cat_pid=0;
				this.addCateForm.cat_level=0;
			}
			
		},
		addCate(){
			console.log(this.addCateForm);
			this.$refs.addCateFormRef.validate(async valid=>{
				if(!valid) return ;
				const {data:res}=await this.$http.post('categories',this.addCateForm);
				if(res.meta.status!==201)
					return this.$message.error('添加分类失败');
				this.$message.success('添加分类成功')
				this.getCateList();
				this.addCateDialogVisible=false;
			})
		},
		addCateDialogClosed(){
			this.$refs.addCateFormRef.resetFields();
			this.selectedKeys=[];
			this.addCateForm.cat_level=this.addCateForm.cat_pid=0;
		}
	}
};
</script>

<style lang="less" scoped>
.el-button {
	margin-bottom: 15px;
}

.el-cascader {
	width: 100%;
}
</style>